3
6
9
12
a3 + 3a2b + 3ab2 + b3
(a + b)3 + 3ab(a + b)
(a + b)3 - 3ab(a + b)
(a + b)(a2 + ab + b2)
52
46
26
22
7
11
(x2-y2)/2
(x2-y)/2
2xy
xy
x + 1
-1
x - 1
1
6ab
12ab
18ab
24ab
2
4
0
13
14
49/9
14/9
7/3